Hair loss, otherwise known as alopecia, can be caused by different reasons, including damage to the hair shaft or follicles or fungal infections. There are two main types of alopecia. Alopecia areata occurs when the body's immune system attacks hair follicles and causes hair to fall out. Androgenetic (or androgenic) alopecia, on the other hand, is an inherited form of hair loss. With alopecia areata, hair can fall out in patches all over the body. With androgenetic alopecia, hair on the head first thins and then falls out. In men, this is called male pattern hair loss; in women, it is called female diffuse hair loss.
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2

Lots of reasons:
Go see your family doc and even get a referral to a dermatologist specializing in hair loss. First, remember that stress can lead to hair loss. Child birth & hospitalization are classic causes of stress but so is surgery. Hair eventually comes back several months later. Thyroid disease can do this too. So can too much testosterone & its derivative, dihydrotestosterone. So get tested and see derm.
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3

Could be months:
Your hair is not lost, just breaking off. It should grow out normally, but may take several months since hair grows intermittently not continuously. Give it time, and avoid chemical treatments. Continue the iron to build your blood count back toward normal.
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5

Hair Loss:
Hair is a protective adaptation of the body to the elements. Hair loss may be a result of numerous factors which may include, genetics, metabolic or exposure to a toxic environment. Medical treatment includes minoxidil, spirinolactone, propecia, (finasteride) etc... There are surgical options which includes implants. Laser therapy may help. Alternative remedies such as fo-ti may also be of help.
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7

Hair loss.:
hair loss has many different causes, anemia, low or high thyroid function, low vitamin levels, genetics, medications etc. you need to see a doctor to get some blood work and find the cause of hair loss and treat it accordingly. Meanwhile you may take some multivitamins.
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